热解油基钻屑资源化利用(Ⅱ):掺渣水泥浆体系性能  

Resource Utilization of Pyrolyzed Oil Cuttings(Ⅱ): Study on the Performance of Cement Slurry with Drilled Cuttings Residue

作　　者：姚晓[1,2] 蔡浩 王高明[3] 葛荘 肖伟 华苏东 YAO Xiao;CAI Hao;WANG Gaoming;GE Zhuang;XIAO Wei;HUA Sudong(College of Material Science and Engineerings Nanjing University of Technology,Nanjing,Jiangsu 210009;The Synergetic Innovation Center for Advanced Materials,Nanjing,Jiangsu 210009;Jiangsu Testing Center for Quanlity of Construction Enineering CO.LTD,Nanjing 210028)

机构地区：[1]南京工业大学材料科学与工程学院,南京210009 [2]江苏先进生物与化学制造协同创新中心,南京210009 [3]江苏省建筑工程质量检测中心有限公司,南京210028

出　　处：《钻井液与完井液》2018年第1期94-100,共7页Drilling Fluid & Completion Fluid

基　　金：江苏高校优势学科建设工程项目(PAPD);江苏高校品牌专业建设工程资助项目(PPZY2015B128)

摘　　要：针对油基钻屑热解吸处理后产生的残渣,尝试将其替代部分油井水泥(YJ)用于制备固井用水泥浆。首先研究了热解油基钻屑(PODC)掺量和水固比对油井水泥浆体性能的影响,同时利用等温量热仪(ICC)、X射线衍射分析仪(XRD)、压汞仪(MIP)和扫描电镜(SEM)分别测试了掺PODC水泥浆体早期水化放热量、水泥石水化产物、孔结构及微观形貌,并以降失水剂CHL、硅灰和晶体膨胀剂KW-4优化了掺PODC水泥浆体的工程性能。结果表明,随着PODC掺量增加,浆体流动度增大,密度减小,凝结时间延长,水泥石抗压强度有所下降;形成了技术套管用掺渣水泥浆体系PODC-6:40%YJ+60%PODC+3%CHL+4%硅灰+2%KW-4,油层套管(非产层段)用掺渣水泥浆体系PODC-3:70%YJ+30%PODC+3%CHL+3%硅灰+2%KW-4,水固比均为0.40,掺渣水泥浆体系各项工程性能均满足固井施工基本技术要求。微观分析表明,掺PODC水泥浆体的水化放热量降低,其水化产物主要为C—S—H凝胶和CH,较净浆水泥石水化产物明显减少,密实度有所降低。该研究可为热解油基钻屑资源化利用提供一种新途径,具有潜在的环保效益和经济效益。Residues from pyrolyzed drilled cuttings from wells drilled with oil base muds are tried to replace part of the oil well cement(YJ)to make cement slurry for well cementing.Studies have been conducted on the effects of the concentration o f pyrolyzed oil drilled cuttings(PODC)and water/solid ratio on the properties of cement slurry.The PODC was measured for its early heat of hydration,hydration products o f set cement,pore structure and microscopic morphology with ICC,XRD,MIP and SEM,respectively.The PODC was optimized for its engineering performance with filter loss reducer CHL,silica fume and crystal expansion agent KW-4.It was found that with an increase in the concent*ation of PODC,the mobility of the cement slurry was increased,the density of the cement slurry was reduced,the setting time of the cement slurry was prolonged,and the compressive strength of the set cement was reduced to some extent.At water/solid ratio o f 0.40,a cement slurry with drilled cuttings residue for intermediate casing cementing,PODC-6:40%YJ+60%PODC+3%CHL+4%silica fiime+2%KW-4,and a cement slurry with drilled cuttings residue for production casing(nonproductive section)cementing,PODC-3:70%YJ+30%PODC+3%CHL+3%silica fume+2%KW-4,were formulated respectively.The engineering properties of the cement slurries with drilled cuttings residue have satisfied the needs of well cementing operations.Microscopic analyses of the cement slurries indicated that cement slurries with PODC had low heat of hydration,and the hydration products of the cement slurries were C-S-H gel and CH.Compared with cement slurry not treated with PODC,the PODC cement slurries had less hydration products,and the degree of density of the PODC cement slurries was also slightly reduced.It is expected that this study will provide a new approach to resource utilization of PODC,and is of potential environmental benefit and economic benefit.

关 键 词：热解油基钻屑 固井 油井水泥 工程性能 微观分析 

分 类 号：TE256[石油与天然气工程—油气井工程] TE923